A recreational vessel is 80 feet in length and has a gross tonnage of 75. What is the minimum number of 20-B portable fire extinguishers required under the tonnage-based table?

Why B is correct

Per 33 CFR §175.320, Table 4, a recreational vessel more than 65 feet in length with gross tonnage more than 50 but not more than 100 requires a minimum of two 20-B portable fire extinguishers. Tonnage of 75 falls in that bracket.